语法解释: $("#select_id").change(function(){//code...}); //为Select添加事件,当选择其中一项时触发 var checkText=$("#select_id").find("option:selected").text(); //获取Select选择的Text var checkValue=$("#select_id").val(); //获取Select选择的Value
Placing Lampposts As a part of the mission ‘Beautification of Dhaka City’, the government has decided to replace all theold lampposts with new expensive ones. Since the new ones are quite expensive and the budget is notup to
ORA-01403: no data foundORA-06512: at "STG.SAP_SO_QM_CUSTOMER_ADDBOM", line 50 NVL函数的格式如下:NVL(expr1,expr2) 含义是:如果oracle第一个参数为空那么显示第二个参数的值,如果第一个参数的值不为空,则显示第一个参数本来的值.
遇到 XXX情况 就 XXX 遇不到就 XXX 结束case when …… then …… else …… end 例如一个3条件取值的字段: case when 条件1 then 取值1 when 条件2 then 取值2 else 取值3 end when后接条件语句,then后为字段取值(数值或字符串等都可以,但类型须一致). CASE WHEN 及 SELECT CASE WHEN的用法: Case具有两种格式.简单Case函数和Case搜索函数. 1. 简单Case函数 CASE s